Method for producing a metal tube by clad rolling one more profiles to form at least one channel, a clad rolling mill for joining one or more profiles, a clad rolled metal tube

Abstract

A method for producing a metal tube including arranging at least one metal profile to form at least one channel for conduction of a fluid. The at least one metal profiled is fed into a clad-rolling mill. A first and second portion of the at least one metal profile are clad-rolled to each other, so that the first and the second portions are joined with each other. The first and the second portions form a seal that holds the at least one metal profile together and seals at least part of the channel. A clad-rolling mill is adapted to produce a metal tube and a metal tube.

1 . A method for producing a metal tube, comprising:
 arranging at least metal profile to form at least one channel for conduction of a fluid,   feeding the at least one metal profile into a clad-rolling mill, and   clad-rolling at least a first and a second portion of the at least one metal profile to each other, so that the first and the second portions are joined with each other, wherein the first and the second portions form a seal that holds the at least one metal profile together.   
   
   
       2 . The method according to  claim 1 , wherein the clad-rolled seal seals at least part of the channel. 
   
   
       3 . The method according to  claim 2 , wherein the clad-rolled seal extends in parallel with and along the length of the channel. 
   
   
       4 . The method according to  claim 1 , wherein the at least one metal profile comprises at least one metal strip, the method further comprising:
 feeding the at least one metal profile and clad-rolling the first and second portions in a continuous operation.   
   
   
       5 . The method according to  claim 1 , further comprising:
 feeding a first and a second metal profile into the clad rolling mill and cladrolling the first and second profiles to each other.   
   
   
       6 . The method according to  claim 1 , further comprising:
 arranging the at least one metal profiles to form at least two channels for conduction of a fluid.   
   
   
       7 . The method according to  claim 6 , further comprising:
 clad-rolling a seal between the two channels, which seal at least in part separates and seals the channels from each other.   
   
   
       8 . The method according to  claim 1 , further comprising:
 clad-rolling a section located inside the region of a channel, so that the cladrolled section strengthen the pressure containing capacity of the tube.   
   
   
       9 . The method according to  claim 7 , further comprising:
 clad-rolling the clad-rolled outer seal or the clad-rolled section inside the channel so that the clad-rolled seal or section guides the fluid flow inside the channel.   
   
   
       10 . The method according to  claim 1 , wherein the metal profiles are clad-rolled so that the thickness of the material of the first and second portions decreases to less than 60% of the original thickness after the clad-rolling. 
   
   
       11 . The method according to  claim 1 , further comprising:
 transferring a second form of energy to the first and second portions in connection with the clad-rolling of the first and second portions.   
   
   
       12 . The method according to  claim 1 , further comprising:
 shaping a section of at least one metal profile to bulge, in order to form a channel from the bulging section.   
   
   
       13 . The method according to  claim 12 , wherein the shaping comprises rolling the at least one metal profile, so that the at least one metal profiles receives a bulging section. 
   
   
       14 . The method according to  claim 13 , wherein the at least one metal profile is shaped by rolling the at least one metal profile between a first and a second shaping roll. 
   
   
       15 . The method according to  claim 14 , wherein the first shaping roll squeezes the bulging section into a groove arranged in the rolling surface of the second shaping roll. 
   
   
       16 . The method according to  claim 1 , further comprising:
 flattening of a wall section of the channel.   
   
   
       17 . The method according to  claim 16 , further comprising:
 rolling the wall section of the channel.   
   
   
       18 . The method according to  claim 1 , further comprising:
 heating the at least one metal profiles to a temperature of at least 200° C.   
   
   
       19 . A clad-rolling mill, comprising:
 a first and a second clad-roll arranged to jointly form a nip for clad-rolling, wherein the first and the second clad-rolls are adapted to clad-roll one or more metal profiles arranged to form at least one channel for conduction of a fluid, wherein the first and the second clad-rolls are shaped to clad-roll a first and a second portion of the one or more metal profiles to each other, so that the first and the second portions are joined with each other, wherein the first and the second portions form a seal that holds the one or more metal profiles together.   
   
   
       20 . The clad-rolling mill according to  claim 19 , wherein the clad-rolls each comprises comprise at least one protrusion adapted to press the first and the second portions together in the clad-rolling nip. 
   
   
       21 . The clad-rolling mill according to  claim 19 , wherein the clad-rolling mill is adapted to arrange at least metal profile to form at least one channel for conduction of a fluid, feed the at least one metal profile into a clad-rolling mill, and clad-roll at least a first and a second portion of the at least one metal profile to each other, so that the first and the second portions are joined with each other, wherein the first and the second portions form a seal that holds the at least one metal profile together. 
   
   
       22 . A metal tube, comprising:
 at least one metal profile arranged so that the at least one metal profile forms at least one channel for conduction of a fluid, wherein the at least one metal profile comprises a first and a second portion joined with each other by clad-rolling, wherein the clad rolled portions jointly form a clad-rolled seal that holds the at least one metal profile together.   
   
   
       23 . The metal tube according to  claim 22 , wherein the clad-rolled seal seals at least a part of the at least one channel. 
   
   
       24 . The metal tube according to  claim 23 , wherein the clad-rolled seal extends in parallel with and along the main part of the length of the channel. 
   
   
       25 . The metal tube according to  claim 23 , wherein the metal tube comprises at least two separate channels, and at least one clad-rolled seal arranged to at least partly separate the two channels from each other. 
   
   
       26 . The metal tube according to  claim 22 , wherein the metal tube is provided with comprises at least one inner clad-rolled section located inside the channel for strengthening the pressure containing capacity of the metal tube. 
   
   
       27 . The metal tube according to  claim 26 , wherein the clad-rolled seal or clad-rolled section is arranged to at least partially guide the fluid flow inside the channel. 
   
   
       28 . The metal tube according to  claim 22 , wherein the metal tube comprises at least a first metal profile comprising a section bulging in one direction and a second metal profile comprising a section bulging in the opposite direction, wherein the first and the second metal profiles are arranged so that the bulging sections jointly form a channel. 
   
   
       29 . The metal tube according to  claim 22 , wherein the metal tube is a multi-channel tube adapted for use in a high-performance heat exchanger.